Image Guides
How to Resize an Image for a Website or Email
SuperSpace Editorial · October 25, 2026
An image that is much larger than its display area can make a page or message slower to load. Resizing creates a copy with dimensions closer to where it will appear, while keeping the original available for future use.
Start with the display dimensions
Check the space where the image will be used. A banner, profile photo, and email attachment have different shape and size needs. If a website or email service gives recommended pixel dimensions, use those as your starting point.
Keep the original proportions
Most image resizers let you set width and height. Keep the aspect ratio locked when you want the full image to remain visible without stretching. If the target space uses a different shape, crop intentionally instead of squeezing the image to fit.
Resize and export a copy
Load the image in an image resizer, enter the target dimensions, and save the result as a new file. Choose a format supported by your destination. For photographs, a compressed format can keep file size down; for graphics that need transparency, use a format that preserves it.
Check sharpness and file size
Preview the resized image at its expected display size. Look for soft edges, clipping, or visible compression. If it appears too soft, export from the original at a larger dimension rather than repeatedly resizing a previously reduced copy.